[INFO] fetching crate macvtap 0.1.2...
[INFO] testing macvtap-0.1.2 against beta-2021-08-01 for beta-1.55-1
[INFO] extracting crate macvtap 0.1.2 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate macvtap 0.1.2 on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate macvtap 0.1.2
[INFO] finished tweaking crates.io crate macvtap 0.1.2
[INFO] tweaked toml for crates.io crate macvtap 0.1.2 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate macvtap 0.1.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 875952c3ed844c46b912fbc9d0dc82f93937e5f8ff0e951e0019d29d99280e06
[INFO] running `Command { std: "docker" "start" "-a" "875952c3ed844c46b912fbc9d0dc82f93937e5f8ff0e951e0019d29d99280e06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "875952c3ed844c46b912fbc9d0dc82f93937e5f8ff0e951e0019d29d99280e06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "875952c3ed844c46b912fbc9d0dc82f93937e5f8ff0e951e0019d29d99280e06", kill_on_drop: false }`
[INFO] [stdout] 875952c3ed844c46b912fbc9d0dc82f93937e5f8ff0e951e0019d29d99280e06
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9e3436fb9f19b1d9247d7d1cc32c4059f54e0771a129a685bdd07d81c97d0730
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "9e3436fb9f19b1d9247d7d1cc32c4059f54e0771a129a685bdd07d81c97d0730", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.66
[INFO] [stderr]    Compiling libc v0.2.81
[INFO] [stderr]    Compiling macvtap v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.74s
[INFO] running `Command { std: "docker" "inspect" "9e3436fb9f19b1d9247d7d1cc32c4059f54e0771a129a685bdd07d81c97d0730", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9e3436fb9f19b1d9247d7d1cc32c4059f54e0771a129a685bdd07d81c97d0730", kill_on_drop: false }`
[INFO] [stdout] 9e3436fb9f19b1d9247d7d1cc32c4059f54e0771a129a685bdd07d81c97d0730
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3b149330d07d242a803a382ecc9343b8734fd5efdc385ae1551af964c9a67ff2
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "3b149330d07d242a803a382ecc9343b8734fd5efdc385ae1551af964c9a67ff2", kill_on_drop: false }`
[INFO] [stderr]    Compiling macvtap v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.32s
[INFO] running `Command { std: "docker" "inspect" "3b149330d07d242a803a382ecc9343b8734fd5efdc385ae1551af964c9a67ff2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3b149330d07d242a803a382ecc9343b8734fd5efdc385ae1551af964c9a67ff2", kill_on_drop: false }`
[INFO] [stdout] 3b149330d07d242a803a382ecc9343b8734fd5efdc385ae1551af964c9a67ff2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 6f049a831f95ca5263d64e5d668b0a5d12c6155e8c5f3aaad1fcc5398ba28bbd
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "6f049a831f95ca5263d64e5d668b0a5d12c6155e8c5f3aaad1fcc5398ba28bbd", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stdout] running 1 test
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/macvtap-657bb990bd85edb6)
[INFO] [stdout] test tests::it_works ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests macvtap
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - Iface::new (line 33) ... FAILED
[INFO] [stdout] test src/lib.rs - Iface::new (line 40) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - Iface::new (line 33) stdout ----
[INFO] [stdout] error: expected one of `!`, `.`, `::`, `;`, `?`, `{`, `}`, or an operator, found `macvtap`
[INFO] [stdout]  --> src/lib.rs:34:10
[INFO] [stdout]   |
[INFO] [stdout] 4 | modprobe macvtap
[INFO] [stdout]   |          ^^^^^^^ expected one of 8 possible tokens
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - Iface::new (line 40) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `smol`
[INFO] [stdout]   --> src/lib.rs:50:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use smol::{Async};
[INFO] [stdout]    |     ^^^^ use of undeclared crate or module `smol`
[INFO] [stdout] 
[INFO] [stdout] error[E0728]: `await` is only allowed inside `async` functions and blocks
[INFO] [stdout]   --> src/lib.rs:53:1
[INFO] [stdout]    |
[INFO] [stdout] 3  | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_40_0() {
[INFO] [stdout]    |                                         ----------------------------- this is not `async`
[INFO] [stdout] ...
[INFO] [stdout] 16 | async_iface.read(&mut buf).await;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ only allowed inside `async` functions and blocks
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`)
[INFO] [stdout]    --> src/lib.rs:45:56
[INFO] [stdout]     |
[INFO] [stdout] 3   |   fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_40_0() {
[INFO] [stdout]     |  ______________________________________-
[INFO] [stdout] 4   | | use macvtap::{Iface, Mode};
[INFO] [stdout] 5   | | use std::{io::{Read, Write, Result}, vec};
[INFO] [stdout] 6   | |  
[INFO] [stdout] 7   | | // sync read/write
[INFO] [stdout] 8   | | let mut iface = Iface::new("tap0", Mode::MacvTap, 1500)?;
[INFO] [stdout]     | |                                                        ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout] ...   |
[INFO] [stdout] 16  | | async_iface.read(&mut buf).await;
[INFO] [stdout] 17  | | } _doctest_main_src_lib_rs_40_0() }
[INFO] [stdout]     | |_- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<Result<Infallible, std::io::Error>>` is not implemented for `()`
[INFO] [stdout] note: required by `from_residual`
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `read` found for struct `Vec<{integer}>` in the current scope
[INFO] [stdout]   --> src/lib.rs:47:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | buf.read(&mut buf);
[INFO] [stdout]    |     ^^^^ method not found in `Vec<{integer}>`
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`)
[INFO] [stdout]    --> src/lib.rs:52:36
[INFO] [stdout]     |
[INFO] [stdout] 3   |   fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_40_0() {
[INFO] [stdout]     |  ______________________________________-
[INFO] [stdout] 4   | | use macvtap::{Iface, Mode};
[INFO] [stdout] 5   | | use std::{io::{Read, Write, Result}, vec};
[INFO] [stdout] 6   | |  
[INFO] [stdout] ...   |
[INFO] [stdout] 15  | | let async_iface = Async::new(iface)?;
[INFO] [stdout]     | |                                    ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout] 16  | | async_iface.read(&mut buf).await;
[INFO] [stdout] 17  | | } _doctest_main_src_lib_rs_40_0() }
[INFO] [stdout]     | |_- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<_>` is not implemented for `()`
[INFO] [stdout] note: required by `from_residual`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 5 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0432, E0599, E0728.
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - Iface::new (line 33)
[INFO] [stdout]     src/lib.rs - Iface::new (line 40)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 2 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.34s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass '--doc'
[INFO] running `Command { std: "docker" "inspect" "6f049a831f95ca5263d64e5d668b0a5d12c6155e8c5f3aaad1fcc5398ba28bbd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6f049a831f95ca5263d64e5d668b0a5d12c6155e8c5f3aaad1fcc5398ba28bbd", kill_on_drop: false }`
[INFO] [stdout] 6f049a831f95ca5263d64e5d668b0a5d12c6155e8c5f3aaad1fcc5398ba28bbd
